Hkdon
Great!!
Installs perfect and rock solid
B&T Mounting Rail NAR Low Profile Mount
-For SIG SG 550/551/552/553
Features:
Lenght - 159 mm
Width - 21 mm
Height - 16 mm
Weight - 72 g
Material - Aluminum, Steel
NAR Rails - 1
Surgace Treatment - Anodized